Because I am not content to permit you (not you in particular, of course) to subject me to ANY form of harassment as a result of my political donations. As policy, demanding such things might tend to stifle freedom of speech and freedom of association.
Again, Freedom of Speech is not Freedom of Consequences. If you believe enough to open your wallet, then you should be willing to stand behind that. Otherwise, don't give.
When I speak here, I am perfectly content to take the barbs, the slings and the arrows of irrational lefties. Water off a duck's back.
But when the fubars of the whacky left start engaging in more dangerous harassment of their political opponents, I am not anywhere near so content. You leftie schmucks think that it is perfectly ok to engage in economic blackmail for example. Some of your more extreme lefty idiots also believe in physical intimidation. I might be up for a rumble, but I would not expose my family to it.
And yet, I am not in the slightest bit willing to be silenced by virtue of the intimidation tactics of a bunch of Stalinist tugs.
So, with or without your imprimatur, I continue to maintain that I have a right to give to the causes of my choosing (i.e., political parties, individual candidates and the like) without being compelled to disclose my identity to a bunch of thugs.
And therefore, your "advice" is flatly rejected as the ignorant musings of someone who just doesn't get it.
If I contribute to a political cause (like, let's make up a group, "Conservatives in Favor of Limited Government") and if this is the kind of thing that would get you leftist twerps in a lather, ready to "silence" me via intimidation etc., I will continue to provide my financial support
without disclosing it to your fellow travelers.
I decline your generous invitation to enjoy invalid and perhaps criminal "consequences" from a bunch of Stalinist thugs.